Improvement in wagon-springs



E. P. MCCARTHY.

Wagon and Car Spring.

Patented June I, 1869.

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EDMOND P. MCCARTHY, OF sAN FRANCISCO, CALIFORNIA, ASSIGNOR To HIMSELFAND JOHN GRANT.

Letters 'Patent No. 90,861, dated June 1,1869.

IMPROVEMENT IN WAGON-SPRINGS.

The Schedule referred to in these Letters Patent and. making part of thesame.

To all whom it may concern Be it known that I, EDMOND P. MCCARTHY, ofSan Francisco, in the county of San Francisco, and State. of California,have invented certain new and useful Improvements in Wagon andRailroad-Gar Springs; and I do hereby declare that the following is afull and exact description of the same, reference being bad to theaccompanying drawings, and to the letters of reference marked thereon.

with an elastic cushion and cups. struction will be fully describedhereinafter.

In the centre of the lower cup is placed a cushion,

of India rubber, in the form of an ellipse, which is held by a bolt thatpasses through the cup-plates and spring, the head being countersunk inthe cushion.

The upper cup is attached to the spring in the same manner, and both theends of the cup-plates.

are clipped to the spring, so that the leaves are firmly bound together.

Referring to the drawings- Figure 1 is a sectional elevation of mydevice, showing the manner of attachment to the spring, the spring beingshown in red.

Figure 2 is an elevation.

A and B are the upper and lower cups, which are made of metal, (I preferto use brass, because it will not oxidize, yet any other metal mightanswer,) and provided with base-plates, D D. v

- An India-rubber, or elastic cushion is placed in the lower cup, whereit is held firmly by a bolt, E, with a thread, which passes through thecushion, bottom of the cup, and'base-plate, and also through the spring,where it is held by a nut, so that by turning the cushion it can betightened or loosened, and the end he made to fit the cup more closely.

The cushion, F, is in the form of an ellipse. I prefer this form to thatof a sphere, principally on account of the distance that the spring hasto descend before itis supportedat all by the cushion. It is true thetwo-thirds of the distance,-more or less, by the action of the screwin'the baseof the cup, after which the hole above may be filled up, toprevent the accumulation of dust.

The shape of the bolt-head, H, is such that it forms a doublecountersink above and below it in the cushion, and holds it in positionin the cup when pressed down with weight, as well as when entirelyrelieved from'it. By this means, also, the cushion will be preventedfrom turning to either side of the spring, or doubling over when itreceives the weight of the load, and the upper cup bears down upon thetop of 'it.

Both ends of the upper and lower cup-plates-are clipped to the spring,firmly binding the-leaves together, and largely relieving the inner.leaves from vibration, so incident to elliptic springs, more especiallyin passing over rough places.

In attaching my device to cars, the same general formof cushion isemployed, yet it would be necessary to use a much larger-sized spring,or cushion; and either the bolt and head already mentioned, or theplunger, or rod described in my former specification, will be requiredto keep the cushion in place.

Having thus described my invention,

, What I claim, and desire to secure byLetters Patent, is'

The bolt E, constructed with the head H, as described, so as to form acountersink above and below ifit iu the cushion, or spring,substantially as specied. In witness whereof, I have hereunto set myhand and seal.

EDMOND P. MCCARTHY. [L. s] Witnesses:

O. W. M. SMITH,

F. J. THIBAULT.

